PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4L4FKBearing,sleeve

Thomson Industries Inc · NSN 3120-00-809-2533 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-809-2533 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-809-2533. Primary manufacturer part number: 4L4FK.
Features
  • Bearing,sleeve — FSC 3120
  • Body Inside Diameter: 0.2510 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM IN
  • Antirotation/lubrication Type and Quantity: 1 HOLE AND 4 SLOT
  • Corner Shape: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
  • Body Outside Diameter: 0.2965 INCHES MINIMUM AND 0.2975 INCHES MAXIMUM IN
  • Hole Diameter: 0.0625 INCHES MAXIMUM FIRST IN
  • Corner Shape: SQUARE OUTSIDE LEFT CORNER
  • Material: PLASTIC POLYAMIDE NYLON OVERALL
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Plastic Polyamide Nylon Overall construction
General Description

The Bearing,sleeve, cataloged under National Stock Number 3120-00-809-2533, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Thomson Industries Inc. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3120-00-809-2533
Primary Part Number4L4FK
Item NameBearing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerThomson Industries Inc
StatusCANCELLED
Body Inside Diameter0.2510 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM IN
Antirotation/lubrication Type and Quantity1 HOLE AND 4 SLOT
Corner ShapeSQUARE LEFT FLANGE OUTSIDE RIGHT CORNER
Body Outside Diameter0.2965 INCHES MINIMUM AND 0.2975 INCHES MAXIMUM IN
Hole Diameter0.0625 INCHES MAXIMUM FIRST IN
Corner ShapeSQUARE OUTSIDE LEFT CORNER
MaterialPLASTIC POLYAMIDE NYLON OVERALL
Flange Outside Diameter0.3900 INCHES MINIMUM AND 0.4210 INCHES MAXIMUM IN
Slot Width0.0525 INCHES MINIMUM AND 0.0625 INCHES MAXIMUM AND 0.0250 INCHES NOMINAL FIRST IN
Slot Length0.0156 INCHES MINIMUM AND 0.0781 INCHES MAXIMUM AND 0.0941 INCHES MINIMUM AND 0.1234 INCHES MAXIMUM FIRST IN
Flange Width0.0200 INCHES MINIMUM AND 0.0250 INCHES MAXIMUM IN
Corner ShapeSQUARE INSIDE LEFT CORNER
Corner ShapeSQUARE OUTSIDE RIGHT CORNER
Corner ShapeROUND LEFT FLANGE BODY CORNER
Corner ShapeSQUARE INSIDE RIGHT CORNER
Style DesignatorSPLIT, EXTERNAL FLANGE ONE END
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 2
5950-00-904-08892673 INTERCHANGEABLE
Transformer,pulse
Pulse Engineering Inc
5330-01-194-04754165 INTERCHANGEABLE
Gasket
Carlisle & Finch Co
Cross-Reference Index
Part NumberManufacturer
3677U Carlisle & Finch Co (USA)
74350095001 Elbitamerica, Inc. (USA)
4L4EKTY6 Thomson Industries Inc (USA)
9101374 Us Army Aviation and Missile Command (USA)
4L4FK PRIMARY Thomson Industries Inc (USA)
74-35009-5001 Elbitamerica, Inc. (USA)
Related Parts
5950-00-904-0889INTERCHANGEABLE
TRANSFORMER,PULSE
2673
5330-01-194-0475INTERCHANGEABLE
GASKET
4165

Frequently Asked Questions

What is NSN 3120-00-809-2533?

NSN 3120-00-809-2533 is a Bearing,sleeve, manufactured by Thomson Industries Inc, classified under FSC 3120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3120-00-809-2533?

NSN 3120-00-809-2533 has 6 cross-referenced part numbers: 3677U (Carlisle & Finch Co), 74350095001 (Elbitamerica, Inc.), 4L4EKTY6 (Thomson Industries Inc), 9101374 (Us Army Aviation and Missile Command), 4L4FK (Thomson Industries Inc) and 1 more.

What NSN replaces 3120-00-809-2533?

There are 2 known substitutes for 3120-00-809-2533: 5950-00-904-0889, 5330-01-194-0475. Verify interchangeability with system specifications before substitution.

What are the specifications of 4L4FK?

Key specifications for 4L4FK: Body Inside Diameter: 0.2510 INCHES MINIMUM AND 0.2520 INCHES MAXIMUM IN; Antirotation/lubrication Type and Quantity: 1 HOLE AND 4 SLOT; Corner Shape: SQUARE LEFT FLANGE OUTSIDE RIGHT CORNER; Body Outside Diameter: 0.2965 INCHES MINIMUM AND 0.2975 INCHES MAXIMUM IN. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3120-00-809-2533 still in active supply?

NSN 3120-00-809-2533 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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